NBN ISO 16840-2:2021

This document specifies apparatus, test methods and disclosure requirements for wheelchair seat
cushions intended to maintain tissue integrity and prevent tissue trauma. Test conditions simulate
a symmetric anatomy and posture and do not represent cushion performance for specific individual
users. Loads are intended to represent those seen under the pelvis of a 50th percentile wheelchair user
and are not intended to assess the weight capacity of the cushion or to characterize the cushion under
bariatric loads. It is possible that not all test methods apply to existing and future cushion technologies.
It does not include test methods or requirements for determining the fire resistance of cushions.
This document can also be applicable to tissue integrity management devices used as other support
systems, as well as to cushions used in situations other than a wheelchair.